An absolutely mint mail order ZX81 with an unused PSU and manual. Of course,
this doesn't mean that the machine itself had never been used - ZX81s were never
the most reliable machine on the planet so its entirely possible that the previous
owner's first machine broke - he bought a new one rather than have the old one
fixed and never used the PSU or manuals etc......but if this was for sale on
ebay nobody would mention that fact......